He described the Trocaz Pigeon, a Madeiran endemic bird species.

The Trocaz Pigeon was formally described in 1829 by Karl Heineken.

Trocaz Pigeon breeds in caves, laying one white egg (biology) in a nest on a ledge.

The Trocaz Pigeon is exclusively herbivorous.

The Trocaz Pigeon prefers primary forests, but secondary growth is used for feeding, and agricultural land is also visited, especially at times of fruit shortage.

A scarce resident breeder in laurisilva forests, the Trocaz pigeon lays one white egg in a flimsy twig nest.

This is a monotypic species, although in the past Bolle's Pigeon was sometimes regarded as a subspecies of the Trocaz Pigeon.

This was paler than the Trocaz Pigeon and had white wing patches and a more extensive green iridescence on the nape, but it became extinct before 1924.

Bolle's Pigeon is more similar in appearance to the Trocaz Pigeon, although it lacks the whitish neck patch and has a more extensively pink breast.

The Trocaz Pigeon formerly bred on both the main island of Madeira and nearby Porto Santo Island.

The Trocaz Pigeon was formally described in 1829 by Karl Heineken, a German medical doctor and ornithologist who was living on Madeira at the time.

The Trocaz Pigeon was recognised as a different species from the other local form, the now-extinct Madeiran Wood Pigeon, the two local pigeons never interbred or habitually associated together.

Madeira has three endemic bird species: Zino's Petrel, the Trocaz Pigeon and the Madeira Firecrest, while the Madeiran Chaffinch is an endemic subspecies.

The Parque Natural da Madeira national park has a management plan for the Trocaz Pigeon, and it is hoped that an education campaign and the promotion of bird scarers may reduce persecution.

The Trocaz Pigeon, Madeira Laurel Pigeon or Long-toed Pigeon (Columba trocaz) is a pigeon which is endemic to the island of Madeira.

One of several subgroups within Columba consists of the widespread Eurasian Common Wood Pigeon, Bolle's Pigeon, the Trocaz Pigeon, and the African Afep Pigeon.

The Trocaz Pigeon's voice is weaker and deeper than that of Common Wood Pigeon, typically consisting of six syllables with the middle pair of notes extended and stressed: uh-uh hrooh-hrooh ho-ho.

Long-toed Pigeon.

LONG-TOED PIGEON Columba trocaz.

The Trocaz Pigeon, Madeira Laurel Pigeon or Long-toed Pigeon (Columba trocaz) is a pigeon which is endemic to the island of Madeira.

Its berries are consumed mostly by the endemic Madeiran pigeon Columba trocaz.

The Trocaz Pigeon, Madeira Laurel Pigeon or Long-toed Pigeon (Columba trocaz) is a pigeon which is endemic to the island of Madeira.